Behind-the-ear hearing aid unit



FIG. 1 is an elevated left, rear perspective view of the behind-the-ear hearing aid unit;

FIG. 2 is a right side view of the behind-the-ear hearing aid unit;

FIG. 3 is a left side view of the behind-the-ear hearing aid unit;

FIG. 4 is a front view of the behind the ear hearing aid unit;

FIG. 5 is a rear view of the behind the ear hearing aid unit;

FIG. 6 is top view of the behind-the-ear hearing aid unit when the bottom surface is substantially horizontal; and,

FIG. 7 is a bottom view of the behind-the-ear hearing aid unit. 

The ornamental design for a behind-the-ear hearing aid unit, as substantially shown and described. 